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Original Article


Are all mandibles golden? A cephalometric study of mandibular morphology as compared to the golden proportion

Sharanya Sabrish1Vinod Pattabiraman1K. Sadashiva Shetty2Sandesh S Pai1Nandini S1
1Departments of Orthodontics and Dentofacial Orthopedics, Vydehi Institute of Dental Sciences and Research Center, Whitefield, Bangalore, 2Departments of Orthodontics and Dentofacial Orthopedics, Bapuji Dental College and Hospital, Davangere, Karnataka, India
Corresponding Author:

Sharanya Sabrish

Department of Orthodontics and Dentofacial Orthopedics, Vydehi Institute of Dental Sciences and Research Center, Whitefield, Bangalore, India.
E-mail: drsharanyaortho@gmail.com

Corresponding Author:

Sharanya Sabrish

Department of Orthodontics and Dentofacial Orthopedics, Vydehi Institute of Dental Sciences and Research Center, Whitefield, Bangalore, India.
E-mail: drsharanyaortho@gmail.com

DOI: 10.4103/2321-1407.115982 Facebook Twitter Google Linkedin

ABSTRACT


Objective: To evaluate the ratio of the condylar axis and corpus axis of the mandible in subjects with different growth pattern and sagittal skeletal relation. To assess if the above ratio is similar to the golden ratio in all the groups of patients. Materials and Methods: pretreatment lateral cephalograms of adult patients were analyzed and six groups were selected with 30 patients in each group. (male: 15, female: 15). The characteristics of each group were: Group 1 — patients with average growth pattern, Group 2 — horizontal growth pattern, Group 3 — vertical growth pattern, Group 4 — class-I skeletal bases, Group 5 — class-II skeletal bases, and Group 6 — class- III skeletal bases. The cephalograms were traced manually and the ratio between condylar and corpus axis was calculated using Golden ratio software (http://www.markuswelz.de/ software2/index.html). The mean ratio for each group was calculated and this ratio was compared with the golden ratio (0.6180) using sample t test. P value was set at 0.05. Results: No statistically significant difference (P > 0.05) was found between the mean value of the ratio of condylar to corpus axis of the mandibles and the golden ratio in all groups except the vertical growth pattern group (P < 0.01). Conclusion: In the sample studied, the ratio of condylar axis to corpus axis in all groups closely matches the golden ratio except in the vertical growth pattern patients where the ratio was significantly reduced (0.6151).
Keywords: Condylar axis, corpus axis, golden ratio, mandible

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